因式分解:-14x^2y^2+x^4+y^4
问题描述:
因式分解:-14x^2y^2+x^4+y^4
答
-14x"y" + x^4 + y^4
= (x")" + 2(x")(y") + (y")" - 16(x")(y")
= ( x" + y" )" - ( 4xy )"
= ( x" - 4xy + y" )( x" + 4xy + y" )